问题描述
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.databinding.DataBindingUtil
import androidx.drawerlayout.widget.DrawerLayout
import com.example.tender.R
import com.example.tender.databinding.FragmentAvailableTenderBinding
import com.example.tender.databinding.FragmentLoginBinding
import androidx.navigation.fragment.findNavController
import androidx.navigation.ui.NavigationUI
/**
* A simple [Fragment] subclass.
*/
class AvailableTenderFragment : Fragment() {
private lateinit var drawerLayout: DrawerLayout
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
val binding = FragmentAvailableTenderBinding.inflate(inflater)
drawerLayout = binding.drawerLayout
**val navController = this.findNavController(R.id.nav_host_fragment)**
**NavigationUI.setupActionBarWithNavController(this, navController, drawerLayout)**
NavigationUI.setupWithNavController(binding.navView, navController)
binding.root
}
}
当我将鼠标悬停在findnavcontroller上时，将显示对于许多有趣的参数，在androidx.navigation.fragment中定义的Fragment.findNavController():NAvcontroller".我无法解决以上粗体行中的错误.在这种情况下，我该怎么办?
"To many arguments for public fun Fragment.findNavController():NAvcontroller defined in androidx.navigation.fragment" is showing when i hover on findnavcontroller.I am unable to resolve the error on the above bold lines.In this case what should I do?
推荐答案
按照导航到目标文档，您导入的 androidx.navigation.fragment.findNavController 不带任何参数(它会找到当前Fragment的父级NavHostFragment，不需要ID为NavHostFragment).
As per the Navigate to a destination documentation, the androidx.navigation.fragment.findNavController you've imported takes no parameters (it finds the parent NavHostFragment of the current Fragment and doesn't need the ID of the NavHostFragment).
您编写的行，即 findNavController(R.id.nav_host_fragment)和 setupActionBarWithNavController()是您在Activity中调用的方法，而不是在片段.
The lines you've written, namely findNavController(R.id.nav_host_fragment) and setupActionBarWithNavController() are methods you'd call in an Activity, not in a Fragment.
这篇关于为了许多有趣的论点Fragment.findNavController()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！